Fountain-pen.



L. GHAPMAN.

FOUNTAIN PEN.

APPLICATION FILED PEB.4,1918.

Patented. July 14, 391A.

lgm am q WILLiAM L. CHAPMAN, or NEW YORK, iv. Y.

FOUNTAIN-PEN.

Specification of Letters Patent.

Patented July 14, 1914.

Application filed February 4, 1913. Serial No. 746,219.

To all whom it may concern:

Be it known that I, \VILLIAM L. CHAP- MAN, a resident of the borough ofBrooklyn, city and State of New York, have invented certain new anduseful Improvements in Fountain-Pens, of which the following is aspecification, (Case G,) accompanied by drawings.

The invention relates to improvements in fountain pens and preferably ofa character having, inherent in their structures, devices for drawing inink from the body of the ink-in order to refill the pen. Preferablyalso, the improvement is embodied in a frontfilling pen in which the inkcan be drawn through the same duct that supplies ink from the reservoirto the pen point.

The object of the invention is to provide the pen with filling devicesof simple, reliable and easily operated character.

To this end, the preferred embodiment oi. the invention provldes animperforate piston which can be thrust to the forward end of thereservoir and then drawn back in order to suck in the ink and can thenbe left at the rear end of the barrel and the operating rod of thepiston detached and he d in a holding device outside the reservoir andeither within a recess in the wall of the reservoir or on the exposedoutside face of the wall.

The nature of the invention is such that it will .bereadily understoodfrom the description of the accompanying drawings.

Figure 1 is a longitudinal view partly in central section showing a penembodying the improvement. Fig. 2 is a rear end view oi the pen with theend cap D missing. Fig. 3 is a cross-section on the plane 33 of Fig. 1.Fig. 4 is a detailed View of the piston rod F. Fig. 5 is a partial viewof the same pen as Fig. 1, showing the piston rod at the position ofmidoperation. Fig. 6 is another form of the improvement, seen partly inoutside view and partly in central section. Fig. 7 is an end view of thesamepenv with the rear end cap removed. Fig. 8 is a detailed view of amodified piston rod holding device, shown in storage position againstthe barrel with the end cap D removed. Fig 9 is a longitudinalcross-section of another form of the invention. Fig. 10 is across-section of the same on line 1010 of Fig. 9.,

The piston operating rod may preferably be of metal and very slimrelative to the diameter'of the reservoir. T herod may he held orstored, when not in use, in a socketor Scabbard formed in the wall ofthe barrel, or it may be laid in a groove in the exposed face of thebarrel, or it may lie entirely outside of the barrel within one or moremetallic collars or bands surrounding the barrel. In the operation ofthe pen, the piston, after being drawn back to drawthe ink, may be leftundisturbed at the higher position without danger of producing pressurewhile disconnecting the piston rod or while placing it in storageposition.

In Figs. 1 to 5, inclusive, .B is the barrel of the pen containin theink reservoir. O is the filling piston. T) shows the screw plug cap forclosing the piston rod orifice at the rear end of the barrel and forbinding the piston rod when in its storage posit-ion. Piston C isimperforate and has a screw-threaded recess by which it is screwed ontoand secured to the screw-threaded operating rod F. This piston rod ispreferably of stiff wire, the upper end being bent to a loop and theloop bent down at right angles to the shaft of the rod. The loop or eyeformed at the.

upper end of the rod F serves the purpose of handle and also that of alock. The screw-threaded plug of ca D is adapted, as shown in Fig. 1, topass tlirough the eye of the filling piston rod and to hold the handleend of the piston rod tightly to the end of the pen. In Fig. 1, theforward end of the piston rod F is shown lying in and received and heldby a channel or groove in the outer face of the reservoir wall. Detailsof construction will be clear from a comparison of Figs. 1, 2, 3, 4 and5 with each other. The rear end of the barrel of the pen and the eye andthe rear end of the piston rod F are fitted to eachother so that the capD can be screwed snugly down to hold these two parts firmly together inposition, shown in Fig. 1. In operating this pen, when it needsrefilling, the screw cap I) is first taken off and the piston rod Finserted through the hole B and screwed into the piston. Thereupon thepiston can be operated, as plainly shown in Fig. 5, and can express thelast drops of the old ink and then draw in fresh ink. After drawing thepiston toits rearmost position, as shown in Fig. 1, the rod F isunscrewed and restored to the position there shown and there secured bymeans of the cap D. It will be seen that in disconmeeting and storingthe piston rod F nothing occurs tending to produce a pressure or todecrease the activereservoir space in front of the piston C.

In Figs. 6 and 7, it Will be seen that the piston rod F is stored in atubular recess or passage within the wall of the pen, this passage beingmarked B in Fig. 7. In other respects, the construction of Figs. 6 and 7may be similar to Figs. 1 to 5.

In Fig. 8, the piston rod F, seen in storage position, is held'to thewalls of barrel B by means of a metallic-band G, similarly to the oldram-rod holders on ancient guns. When stored in this position, thepiston rod forms av projection on the Wall of the pen Which will preventthe pen rolling down a slightly inclined table or other supportingsurface. The loop or eye of the rod F is held as described in connectionwith Figs. 1 and 2.

In Fig. 9 the piston rod F is shown operating eccentrically upon thepiston 0 through an eccentric hole at the rear end of the pen barrel B.Centrally extending from the rear end of the barrel through a slidingink-tight joint in'the piston is a sheath H closed at its forward endand adapted to receive the piston operating rod F when the rod has beendisconnected from the piston. The rear end cap or cover D may bepermanently secured concentrically to the rear end of the piston rod F,so that when the piston rod is put in its sheath, the pen is ready foruse. The cap may be screwed down ipon the screwthreads D, tightlycovering and concealing the rod, the sheath and the perforations in therear end of the barrel. If the piston rod F fits approximately' tightlythrough the perforation in which it reciprocates in operating thepiston, then a separate vent-hole K may be provided to allow air to passinto and out of the pen barrel behind the piston.

It will be seen that the piston operating rod may have any' of a greatVariety of secure by Letters Patent the following, as

an article of manufacture and an. improvement in fountain pens and thelike:

1. A fountain pen having a barrel provided with an ink reservoir, afilling piston, and a piston rod detachable from the piston for storage,said barrel having a rear end wall provided with an opening foradmittingtthe piston rod'in operative position, arid means for receivingthe piston rod in storage position separated from the piston, and arear-end cap which closes the said piston rod opening and also engagesand secures the rear end of the piston rod when in its storage position.

2. A fountain pen having a barrel provided with an ink reservoir, :1filling piston therein, a piston rod detachable from the piston forstorage and having a handle at its rear end, said pen having means forreceiving and holding the piston rod when detached and separated fromthe .piston,

and a cap which closes the rear end of the.

barrel and engages and confines the said handle in its storage position.

In testimony whereof'I have signed this specification in the presence oftwo subscribing witnesses, this 27th day of January,

WM. L. CHAPMAN.

Witnesses:

HOBART W. GEY'ER, JOHN HERB.

